JP5627398B2 - Curtain airbag - Google Patents

Description

The present invention is, for example, relates to curtain airbags to deploy along the window portion of the vehicle compartment side of the vehicle.

  2. Description of the Related Art Conventionally, as an airbag that inflates and deploys by introducing gas, a so-called curtain airbag is known in which an airbag is deployed along a window portion of a door on a side portion of a vehicle compartment. This airbag has a bag-like shape and includes an inflating portion that is inflated and deployed by introducing a gas, and a plurality of attachment pieces that protrude from the inflating portion. In the normal state, the inflatable portion is elongated and disposed along the upper edge portion of the window portion on the side of the passenger compartment, and each attachment piece is fixed to a fixed point of the vehicle body by a rivet or the like. When an impact such as a side collision or rollover occurs, gas is supplied from the inflator to the inflatable portion, and the inflatable portion expands downward, covering the side windows and pillars, etc. Protect.

  Here, since the attachment piece has a shape protruding from the base fabric constituting the inflating portion, waste is generated when the base fabric is cut out from the original fabric, which hinders reduction in manufacturing cost. In addition, since the part of the mounting piece is a non-inflatable part where gas is not introduced and can be flexibly deformed, the effect of restricting the position of the inflating part after the deployment process or after deployment with respect to the fixed point of the vehicle body is small, If a plurality of straps or separate guide members are provided in order to stabilize the position by suppressing the shaking of the airbag, the manufacturing cost increases.

  Here, a configuration is known in which a connecting portion having a large longitudinal dimension is formed by cutting and expanding the inflatable portion (see, for example, Patent Document 1).

  However, even in this configuration, there are a plurality of connecting pieces, and the base fabric tends to be wasted at this portion, which hinders the reduction of the manufacturing cost. In addition, the mounting piece and the connecting portion have little effect of restricting the position by suppressing the rotation of the expanding portion after the deployment process or after deployment, and if a large number of mounting pieces, the connecting portion, or separate guide members are provided, the manufacturing cost is reduced. Rises.

JP 2007-624474 A (first page, FIG. 2)

  As described above, in the configuration in which the mounting piece projecting from the inflating portion is fixed to the fixing point of the vehicle body, the base fabric is likely to be wasted, which hinders the reduction of the manufacturing cost, and against the fixing point of the vehicle body. The effect of restricting the position of the inflatable portion is small, and if a plurality of straps or separate guide members are provided to suppress the rotation of the airbag and stabilize the position, the manufacturing cost increases.

The present invention has been made in view of the above problems, and an object thereof is to provide a curtain airbags which can stabilize the behavior of the curtain airbag after deployment process and development.

Curtain airbag according to claim 1 is a curtain airbag that includes an airbag body portion is inflated and deployed introduces gas from a folded state mounted on the mounting portion in the passenger compartment of a motor vehicle, the air The bag body portion has a base fabric portion stacked on top of each other and an air chamber provided between the base fabric portions, and an inflation that expands and expands in a predetermined direction along a predetermined surface when gas is introduced into the air chamber. A mounting portion that is provided continuously to the rear edge portion of the airbag main body portion with respect to the deployment direction of the inflatable portion, and the base cloth portions are attached to the attached portion in close contact with each other; A reinforcing air chamber is provided that surrounds both sides and the front of the mounting portion with respect to the developing direction, and includes a reinforcing inflating portion that expands and expands when gas is introduced into the reinforcing air chamber.

The curtain airbag according to claim 2 is the airbag according to claim 1, wherein the reinforcing air chamber communicates integrally with the air chamber.

According to the curtain airbag of the first aspect, when the gas is introduced from the folded state into the air chamber provided between the overlapping base fabric portions, the inflating portion is predetermined along the predetermined surface. The object to be inflated and deployed in the direction and moving to the predetermined surface side is restrained and protected. The portion of the attachment portion that is continuous with the rear edge of the airbag main body with respect to the deployment direction of the inflatable portion is in a state where the base fabric portions are in close contact with each other and the gas is not introduced and is easily bent. The gas is introduced into the reinforcing air chamber that surrounds both sides and the front of the mounting portion with respect to the direction, and the reinforcing inflating portion is inflated and deployed, thereby suppressing the bending of the curtain airbag at the inflating portion, and the inflating portion The movement of the curtain airbag can be stabilized by suppressing the movement and the behavior of the curtain airbag after the deployment.

According to the curtain airbag of the second aspect, in addition to the effect of the first aspect, since the reinforcing air chamber is provided integrally connected to the air chamber, the reinforcing inflating portion is mechanically connected to the inflating portion and the curtain. The behavior of the airbag can be stabilized, the configuration of the curtain airbag can be simplified, and the manufacturing cost can be reduced.

The curtain airbag device according to an related art curtain airbag of the present invention which is a part of explanatory view of a state where mounted curtain airbag is inflated and deployed in a vehicle. It is explanatory drawing of the side view of a curtain airbag apparatus same as the above. It is explanatory drawing of a part of curtain air bag apparatus same as the above. It is explanatory drawing which shows one Embodiment of the curtain airbag of this invention. It is explanatory drawing of the side view of a curtain airbag apparatus same as the above. It is explanatory drawing of the cross section of a curtain airbag apparatus same as the above. It is a partial explanatory view showing one reference technique of the curtain airbag of the present invention. It is a partial explanatory view showing other embodiments of the curtain airbag of the present invention. It is a partial explanatory view showing another reference technique of the curtain airbag of the present invention. It is a partial explanatory view showing still another reference technique of the curtain airbag device of the present invention. It is explanatory drawing of the cross section of a curtain airbag apparatus same as the above.

Hereinafter, one related technique of a curtain airbag and a curtain airbag apparatus according to the present invention will be described with reference to the drawings.

  1 to 3, reference numeral 1 denotes an airbag. An airbag device 2 including the airbag 1 is also called a curtain airbag device, and is used as a storage position of a compartment 4 of a vehicle body 3 of an automobile, which is a vehicle. It is arrange | positioned at the roof side part 5 of the upper edge of this door opening part. The airbag 1 is also called a curtain airbag, a side-impact airbag, an inflatable curtain, or a head protection airbag. The airbag 1 is subjected to a side impact or rollover. For example, it is developed in a plane substantially on the side of the occupant to protect the occupant as a protected object. In the following, directions such as front and rear, up and down, and both sides are based on the straight traveling direction of the vehicle, the direction indicated by arrow F is the forward direction, and the direction indicated by arrow A is the downward direction as the predetermined direction.

  The vehicle body 3 includes a front seat and a rear seat in which a passenger can be seated in a passenger compartment 4, and a predetermined surface serving as an opening that can be opened at the top corresponding to the front seat and the rear seat. The door 7 provided with the window part (side window) 6 which comprises is provided. Further, pillars 8 such as a front pillar called A pillar, a center pillar called B pillar as a pillar part, and a rear pillar called C pillar are provided on both sides of the passenger compartment 4 in order from the front side. . The pillar 8 shown in FIG. 1 is a center pillar. A roof side rail 10 constituting a vehicle body panel is provided on the upper side of the pillar 8, that is, an upper edge which is one edge of the window 6, and a nut or a screw hole is provided at a predetermined position of the roof side rail 10. A plurality of attached portions 11 that are attachment points constituted by, for example, are provided at predetermined intervals. A ceiling panel as a ceiling portion is supported through the roof side rail 10.

  The window 6, the door 7 and each pillar 8, and a part of the roof side rail 10 constitute a predetermined surface 14 on both sides of the passenger compartment 4. A front glass (front windshield) is provided on the front side of the front pillars on both sides, and a rear glass is provided on the rear side of the rear pillars on both sides. And the roof side part 5 as a storage position is set from the edge part of the both sides of a ceiling panel to the part concerning the substantially full length of the front pillar extended in the direction which intersects with this edge part. A predetermined surface 14 on which the airbag 1 is deployed is set on the inner corner side virtually formed by the edge portion of the panel and the front pillar.

  The roof side rail 10 and the ceiling panel on the side of the vehicle compartment 4 are covered with roof lining (headlining) 15 which is a soft or deformable ceiling plate and an interior decoration panel together with a part of each pillar. Each seat is provided with a seat belt 9, and the center pillar is provided with a support portion 9 a that supports the seat belt 9. Further, a pillar garnish, which is an interior material, is attached to the entire length of each pillar 8 or a part of the passenger compartment 4 to cover each pillar 8. Further, although not shown, an elastically deformable packing body made of soft resin or the like is attached to the lower end portion of the roof side rail 10. This packing body is also called a welt or a body seal, and the upper portions of the doors 7 are brought into contact with each other and are in close contact with each other.

  The airbag device 2 is a so-called front / rear seat airbag capable of protecting passengers in the front and rear seats, and is stored in the roof side portion 5 surrounded by the roof side rail 10 and the roof lining 15 in an elongated manner. And an inflator 25 that is housed behind or above the rear seat and supplies gas to the airbag 1. Further, the airbag device 2 includes a tether belt 26 connected to the front end portion of the airbag 1, a breakable cylindrical or string-shaped shape holding member that holds the shape of the folded airbag 1, and an attached portion. An attachment 28 to be attached is provided.

  The airbag 1 is a combination of a single base fabric or a plurality of base fabrics. For example, the airbag body has a flat bag shape as a whole by, for example, folding back one base fabric or joining two base fabrics together. Part 30 is formed. The airbag main body 30 has a substantially rectangular shape with the front-rear direction as the longitudinal direction when viewed from the side, and an outer base fabric portion 31 disposed on the vehicle compartment 4 side and an outer side disposed on the vehicle body side. The base fabric portion 32 is overlapped and sewn at a predetermined sewing portion 33 that is a joint portion, and a bag-like inflatable portion 35 that inflates and deploys to protect the occupant by flowing in gas, and an upper rear end portion of the airbag main body 30 There are provided a gas introduction part 36 that communicates with the expansion part 35 to the outside and a non-expansion part that does not flow in gas and does not expand and develop.

  The inflating part 35 is a hollow part and becomes an air chamber 38 inside which is an occupant protection air chamber. The inflating part 35 communicates directly with the gas introducing part 36 and is located along the upper edge of the airbag main body 30. A front seat protection part 42 and a rear seat protection part 43 communicating with the gas guide part 41 are formed.

The sewing portion 33 is configured to be substantially airtight or highly airtight by sewing, bonding, or a combination of sewing and sealing means, and an outer periphery sewing portion 45 for sewing the outer periphery of the inflatable portion 35, and the outer periphery sewing portion 45. And an intermediate sewing portion 46 for defining the protective portions 42, 43 and the like and for regulating the width dimension when the respective portions are unfolded. The outer peripheral sewing portion 45 is formed substantially along the vicinity of the outer peripheral portion of the airbag main body 30 except for the gas introduction portion 36. Further, the intermediate sewing portion 46 is located at one or a plurality of locations of the inflating portion 35 and is formed integrally with or separately from the outer peripheral sewing portion 45. Each intermediate sewing portion 46 is formed with a linear line portion 47 and an annular protective portion 48 that is positioned at the end of the line portion 47 and protects the line portion 47. In this related technique , the intermediate sewing portion 46 is positioned at the front seat protection portion 42 and has a substantially U-shaped front side restriction portion 50 opened on the upper side, that is, the upstream side, and the lower seat portion positioned at the rear seat protection portion 43. Are formed with first and second rear restricting portions 51 and 52 that reach the outer periphery sewing portion 45.

  Further, an inner pipe is provided between the inner base fabric portion 31 and the outer base fabric portion 32 as a means for guiding the gas or regulating the width dimension of the expansion portion 35 during deployment as necessary. The front partition body or the rear partition body is attached by sewing or the like.

Further, the airbag body 30 is formed with attachment portions 55 that are fixing points at a plurality of locations. This attachment portion 55 is a non-inflatable portion, and in this related technology, it is located above the portion that protects the occupant in the vicinity of the upper end portion of the inflatable portion 35 and below the upper end portion, that is, the outer peripheral sewing portion 45. It is located in the gas introduction part 36 that is spaced apart, and is formed at a position surrounded by the expansion part 35. The attachment portion 55 is an area in which the inner base fabric portion 31 and the outer base fabric portion 32 are in close contact with each other and are airtightly partitioned from the inflatable portion 35, and is sewn in a square frame shape. While being joined by the joining portion 56, a sealing material is applied to the sewn portion to improve airtightness. Furthermore, a circular attachment hole 58 is formed in a portion surrounded by the joint portion 56 so as to penetrate the base cloth portions 31 and 32.

Then, in order to surround the four surroundings of the attachment portion 55 and maintain the deployed shape of the portion of the attachment portion 55, a reinforcement inflating portion 61, which is a hollow reinforcing structure in which the airbag main body portion 30 is inflated and deployed, is configured. The inside of the part 61 is a reinforcing air chamber 62. In this related technique , the reinforcing inflating part 61 is a part of the inflating part 35, and the reinforcing inflating part 61 is formed integrally and continuously with the inflating part 35. The reinforcing air chamber 62 is also a part of the air chamber 38, and the reinforcing air chamber 62 is formed integrally with the air chamber 38. That is, in this related technology , the base fabric portions 31, 32 constituting the outer shell of the inflatable portion 35 and the base fabric portions 31, 32 constituting the reinforcing inflatable portion 61 are integrated, and the inflatable portion 35 protecting the occupant The boundary with the reinforcing expansion portion 61 that reinforces the shape is not clearly distinguished from the structural and appearance aspects.

  Further, the fixture 28 is a bolt, and as shown in FIG. 6, a screw portion 28a inserted through the attachment hole 58 of the attachment portion 55 and screwed into the attachment portion 11 of the roof side rail 10 of the vehicle body 3, A head portion 28b is provided that abuts against the vehicle compartment 4 side of the attachment portion 55 and presses the base fabric portions 31, 32 toward the roof side rail 10 side. Further, this bolt may be combined with a circular or square plate having an outer diameter larger than that of the head 28b.

  The airbag body 30 is not provided with a protruding projecting portion called an attachment tab or an ear, and the upper edge of the airbag body 30, that is, the inflating portion 35, that is, the base fabric portions 31, 32. The part is formed linearly.

  Next, a folding process of the airbag 1, an assembly process of the airbag device 2, and an attachment process to the vehicle body 3 will be described.

  First, the airbag 1 is folded by an automatic machine or manually, and first, the front seat protecting part 42 and the rear seat protecting part of the inflating part 35 from the lower end part of the airbag main body part 30 are spread out flat. The portion 43, that is, the lower portion of the attachment portion 55 is wound in a predetermined direction and folded into a roll shape or the like, and the upper portion of the attachment portion 55 is folded into a roll shape or a bellows shape. Then, the screw part 28a of the fixture is inserted into the attachment hole 58 of each attachment part 55 from the inner base cloth part 31 side, and the shape is held by the shape holding member in a state where the upper and lower folded parts are gathered, Fold it into a column.

  Further, the inflator 25 is connected to the gas introducing portion 36 at the rear end portion and is hermetically tightened with the band 64 to constitute a module of the airbag device 2.

  Then, the airbag device 2 is brought into the passenger compartment 4 and is attached to the vehicle body 3 before interior members such as roof lining 15 and pillar garnish are attached. This attaching operation is performed by screwing and fixing the screw portion 28a of the fixture 28 to the attached portion 11 of the roof side rail 10 of the vehicle body 3.

  Further, the harness led out from the inflator 25 is connected to a control device provided in the vehicle body 3. Next, the roof lining 15 is attached to the ceiling panel of the vehicle body 3, the pillar garnish is attached to each pillar 8, and the airbag device 2 is covered, whereby the operation of attaching the airbag device 2 to the vehicle body 3 is completed.

  Next, the deployment operation of the airbag 1 will be described.

  In the event of a side collision or rollover of the vehicle, the inflator 25 is actuated by the control device, and the gas injected from the inflator 25 is introduced from the gas introduction part 36 into the inflating part 35 in the airbag body part 30. Then, the inflating portion 35 of the airbag main body 30 breaks the shape retaining member, and inflates and deploys while pushing away the roof lining 15 and the front and rear pillar garnishes, and as shown in FIG. Is expanded and deployed in the form of a curtain in a substantially downward direction, substantially along the direction of the cover, covering the window 6 and the pillar 8 such as the center pillar, etc., and mitigating the impact of the collision between the occupant and the pillar 8, etc. Prevents and protects the vehicle from being released outside the vehicle.

  More specifically, in the expansion portion 35, gas is rapidly supplied from the rear end portion to the front end portion along the gas introduction portion 36, that is, through the upper and lower portions of the attachment portion 55, and the gas introduction portion 36 is rapidly deployed. Push the roofing 15 open. Then, the front seat protection part 42 and the rear seat protection part 43 located on the lower side of the gas introduction part 36 develop along the predetermined surface 14 while rolling on or sliding against the predetermined surface 14.

  On the other hand, in the upper part of the gas introduction part 36 and the part of the gas introduction part 36, the expansion part 35 surrounds the attachment part 55 and expands as a reinforcing expansion part 61. Here, the portion of the attachment portion 55 is easy to bend because the base fabric portions 31, 32 are in close contact with each other and gas is not introduced, but the gas is introduced into the reinforcing air chamber 62 surrounding each attachment portion 55. Since the reinforcing inflating portion 61 is inflated and deployed, the rigidity of each attachment portion 55 is improved and the shape is maintained in the same manner as the other portions of the inflating portion 35, so that the standing state is maintained.

As described above, according to the airbag 1 of the related technology , gas is introduced from the folded state into the air chamber 38 provided between the base fabric portions 31 and 32 stacked on each other, and the inflating portion 35 is formed. Inflated and deployed downward along the predetermined surface 14, the occupant moving to the predetermined surface 14 side is restrained by the inflating portion 35, and the impact of the collision can be reduced, and the occupant can be prevented from being released from the vehicle.

  Further, the attachment portion 55 of the airbag 1 is not an attachment piece protruding upward from the airbag main body portion 30 but is provided at a position surrounded by the inflating portion 35 of the airbag main body portion 30. Therefore, it is not necessary to provide a shape protruding from the inflating portion 35, the shape of the base fabric portions 31, 32 constituting the airbag 1 is simplified, and material removal for cutting out the base fabric portions 31, 32 from the original fabric is efficient. It can be performed well, that is, the base fabric portions 31 and 32 can be manufactured by efficiently using the raw fabric, thereby reducing the manufacturing cost.

  And, like the attachment piece portion, the attachment portion 55 is in a state where the base fabric portions 31 and 32 are in close contact with each other and the gas is not introduced and is easily bent, but the gas is introduced around the attachment portion 55. Since the reinforced expansion portion 61 having the reinforced air chamber 62 is provided, gas is introduced into the reinforced air chamber 62 and the reinforced expansion portion 61 expands and deploys, so that the expansion portion 35 and the reinforced expansion portion 61 are at least machined. Are connected to each other to generate a reinforcing effect, to suppress the bending of the airbag 1 at the portion of the mounting portion 55, to suppress the lateral movement of the inflating portion 35 so as to sway with respect to the vehicle body 3, The deployment process and the behavior of the airbag 1 after deployment are stabilized, a desired deployment behavior is easily realized, the positional stability is improved, and the occupant can be restrained stably. In particular, a curtain airbag having a long airbag 1 folded in the longitudinal direction of the vehicle is mounted along a linear roof side rail 10 and flattened. The reinforcing expansion part 61 adjacent to the part 55 can easily suppress a swinging behavior.

  Further, since the mounting portion 55 is provided at a position surrounded by the inflating portion 35, the bending of the airbag 1 at the portion of the inflating portion 35 is suppressed in all directions, and the deployment process and the behavior of the airbag 1 after deployment are controlled. Can be stable. Further, since the reinforcing expansion portion 61 is continuously provided upward from the side of the attachment portion 55, the expanded expansion portion 61 is inflated and deployed below the attachment portion 55 by stretching the reinforcement expansion portion 61 above the attachment portion 55. Thus, the positional stability of the expanding portion 35 can be improved.

  Further, since the reinforcing air chamber 62 is integrally connected to the air chamber 38 and the reinforcing inflating portion 61 is also formed integrally and continuously with the base cloth portions 31 and 32 of the inflating portion 35, the reinforcing air chamber 62 has a gas flow. There is no need to provide a separate structure for supplying the gas, the manufacturing cost can be reduced, and the structurally strong connection between the expansion portion 35 and the reinforcement expansion portion 61 can be easily realized, and the flexural strength is easily increased. be able to.

In the related art described above, the mounting portion 55 is provided with a quadrangular enclosure at a position surrounded by the inflating portion 35 and has a quadrangular joint portion 56, that is, a quadrangular outer shape. By providing the reinforcing inflatable portion 61 provided with the reinforcing air chamber 62 located on one side with respect to the lower side, that is, at least one side of the front and rear of the attaching portion 55, the airbag 1 in the portion of the attaching portion 55 is provided. It is possible to realize a desired deployment behavior by suppressing or suppressing the movement of the inflating portion 35 that suppresses deformation and protects the occupant freely with respect to the vehicle body 3 in the direction of the window portion 6.

For example, as in the embodiment shown in FIGS. 4 to 6, a mounting portion 55 is provided along the upper edge portion of the airbag main body 30, that is, the inflating portion 35, and so-called three directions of the mounting portion 55 are reinforced inflating portions. A configuration surrounded by 61 can be adopted. Also in this configuration, since the reinforcement inflating part 61 provided with the reinforcing air chamber 62 is provided on both sides of the attachment part 55, that is, adjacent to the front and back, the deformation of the airbag 1 at the part of the attachment part 55 is suppressed and desired deployment is achieved. Behavior can be realized.

Further, for example, the rectangular joint 56 shown in FIG. 3 may have a circular configuration in which a circular joint 56 is provided as in one reference technique shown in FIG. It can also be.

Further, the attachment portion 55 can be provided not at a position surrounded by the expansion portion 35 but at a position separated from the expansion portion 35. For example, as in the other embodiment shown in FIG. 8, the mounting portion 55 is provided above the inflating portion 35 that protects the occupant, and the air chamber is adjacent to both sides of the mounting portion 55, that is, adjacent to the front and rear. It is also possible to provide a reinforcing expansion chamber 61 by providing a reinforcing air chamber 62 communicating with 38.

Further, for example, as in another reference technique shown in FIG. 9, a reinforcing air chamber 62 is provided in a substantially L shape continuously from one side of the mounting portion 55 to the upper side of the mounting portion 55, thereby configuring the reinforcing expansion portion 61. You can also

  Further, in the configuration shown in FIG. 2 and FIG. 5 described above, the attachment portions 55 are provided at two locations. However, the configuration is not limited to this configuration and can be provided at three or more locations. That is, the mounting portions 55 can be provided at appropriate intervals as long as the gas can be introduced between the mounting portions 55 to form the reinforcing air chamber 62.

In addition, by providing a restricting means for restricting the introduction of gas into the reinforcing air chamber 62, the timing of exerting the effect of suppressing the bending of the airbag 1 at the reinforcing inflating portion 61 and the degree of the effect are controlled and deployed. The desired behavior of the airbag 1 after the process and deployment can be easily realized. For example, as in still another reference technique shown in FIG. 10 and FIG. In this configuration, the attachment portion 55 includes a circular attachment hole 58 and a joint portion 56 that is a circular sewing surrounding the attachment hole 58. Further, a non-inflatable portion 71 into which gas is not introduced by sewing is formed between the attachment portions 55, and a gas flow path 72 is formed along the upper edge portion of the airbag main body 30. A reinforcing air chamber 62 that extends in the vertical direction, that is, a reinforcing inflating portion 61 is formed by communicating the path 72 and the lower inflating portion 35. The restricting means 70 includes a shaft 74 penetrating the mounting hole 58, a round bar-shaped closing means 75 joined to the distal end portion of the shaft 74, a base end portion of the shaft 74, and the roof of the vehicle body 3. A drive means 76 such as a solenoid fixed to the side rail 10 is provided, and so-called a solenoid valve is configured. The restricting means 70 also serves as the attachment 28, and is provided in the attached portion 11 of the vehicle body 3. Regardless of the state of operation described below, the closing means 75 is attached to the attachment portion of the airbag main body 30. The portion 55 is locked, and the airbag main body 30 is held on the mounted portion 11 of the vehicle body 3. Further, the driving means 76 is connected to a control means having a timer or the like, and operates at a predetermined time after the operation of the inflator 25. In addition, a cylindrical sleeve 77 is attached to the roof side rail 10 so as to be fitted to the outer peripheral surface of the shaft 74 so that the shaft 74 can be smoothly advanced and retracted.

In this reference technique , in the initial state before the operation of the inflator 25, the shaft 74 is drawn into the driving means 76 side, and the closing means 75 is pressed so that the base fabric portions 31 and 32 are in close contact with each other. The gas is blocked from being introduced into 62. Here, after the operation of the inflator 25, this state is maintained for a predetermined time. Then, the gas allows the inflating portion 35 to be inflated and deployed efficiently and quickly without inflating and deploying the reinforcing air chamber 62, that is, the reinforcing inflating portion 61, and allows flexible bending deformation at the portion of the mounting portion 55. The influence based on the folding shape of the airbag 1 similar to the airbag using the conventional attachment piece portion can be easily realized by eliminating or reducing the influence on the deployment behavior of the airbag 1. Then, after a predetermined time has elapsed, for example, in a state where the inflating portion 35 protrudes downward from the roof lining 15 and starts to expand, the control means supplies electricity to the driving means 76 and drives the shaft 74 to the vehicle compartment 4 side. Thus, a predetermined gap is formed between the closing means 75 and the roof side rail 10, so that the valve is opened. Then, the gas is supplied to the reinforcing air chamber 62, and the reinforcing expansion part 61 is expanded and deployed. In this state, the reinforcing inflating portion 61 suppresses the bending of the airbag 1 at the attachment portion 55 and improves the positional stability of the airbag 1.

  On the other hand, when the reinforcing inflating part 61 is inflated and deployed prior to the inflating part 35, when the inflating part 35 is deployed, the rigidity of the mounting part 55 is suppressed and the rigidity of the inflating part 35 is ensured. The development direction can be oriented in a desired direction.

  In this way, by controlling the deployment direction of the airbag 1 at the initial stage of deployment and the deployment behavior at the later stage of deployment by performing active control for inflating and deploying the reinforcing inflatable portion 61 at a predetermined timing, such as a combination of a solenoid valve and a timer. In addition, stable position can be easily realized.

  The restricting means may be any one that restricts the gas flow such as a throttle, one that restricts the gas flow temporally such as a timer-controlled valve, or one that restricts the gas flow direction such as a check valve. One or a plurality of them can be combined. Further, the restricting means can be provided corresponding to all the attachment portions 55, or can be provided corresponding to only a part of the attachment portions 55.

  In addition to the active control provided with the control means as described above, the regulation means can be passive control using the pressure of the gas flow without using the control means. For example, a piece of cloth is attached to the communicating portion communicating with the reinforcing air chamber 62 and is swung in a high-speed gas flow to increase the flow resistance, or the communication passage communicating with the reinforcing air chamber 62 is bent. Thus, the flow resistance can be increased by increasing the distance and increasing the time required for gas filling.

  Further, in each of the above embodiments, the reinforcing air chamber 62 of the reinforcing inflating portion 61 communicates directly with the air chamber 38 of the inflating portion 35 that protects the occupant. Although related, it is not limited to this configuration. For example, the gas supplied from one inflator 25 is supplied to the air chamber 38 and the reinforcing air chamber 62 simultaneously, and the gas supplied from one inflator 25 is either the air chamber 38 or the reinforcing air chamber 62. The gas may be supplied from one side to the other, or the gas chamber 38 and the reinforcing air chamber 62 may be independently communicated with each other, and the gas may be supplied from different inflators.

  In addition to providing the reinforcing inflatable portions 61 corresponding to all the attaching portions 55 of the airbag 1, the reinforcing inflating portions 61 can be provided only in some of the attaching portions 55.

  Moreover, the airbag apparatus 2 is equipped with appropriate structures, such as using a metal bracket for the attachment portion 55 as needed, or a resin protector that protects the airbag 1 during storage or deployment. be able to. Moreover, the airbag 1 can take an appropriate folding method.

Furthermore, as another reference technique, the airbag 1 is not limited to a configuration in which the airbag 1 is deployed from the upper side to the lower side and covers the window 6 on the side of the automobile, but is a door-mounted airbag that is deployed upward from the upper part of the door. In addition, the present invention can be applied to an appropriate airbag device that inflates and deploys an airbag in a flat surface shape along a predetermined surface, such as a side airbag that deploys forward from the side portion of the back portion of the seat.

  The present invention can be applied to, for example, an airbag apparatus called a curtain airbag apparatus that is deployed along a side window of an automobile.

1 airbags
11 Mounted part
14 Predetermined surface
30 airbag body
31 Base fabric
32 base fabric
35 Expansion part
38 Air chamber
55 Mounting part
61 Reinforcement expansion part
62 Reinforced air chamber A Specified direction

Claims (2)

A curtain airbag having an airbag main body portion in which gas is introduced from a state of being attached to the attached portion and folded and inflated and deployed in a vehicle interior of an automobile ,
The airbag body is
An inflatable portion having a base cloth portion stacked on top of each other and an air chamber provided between the base cloth portions, wherein gas is introduced into the air chamber and inflated and deployed in a predetermined direction along a predetermined surface;
An attachment part that is provided continuously to the rear edge of the airbag body part with respect to the deployment direction of the inflatable part, and wherein the base fabric parts are in close contact with each other and attached to the attached part;
A reinforcing air chamber provided around the both sides and the front of the mounting portion with respect to the expansion direction, and a reinforcing expansion portion that expands and expands when gas is introduced into the reinforcing air chamber. Curtain airbag. The curtain airbag according to claim 1, wherein the reinforcing air chamber communicates integrally with the air chamber.

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